According to the Warren Commission, on November 22, 1963, from a window on the sixth floor of the Texas School Book Depository, Lee Harvey Oswald assassinated U.S. President John F. Kennedy with a 6.5x52mm Mannlicher-Carcano M91/38 bolt-action rifle, serial number C2766. Skeptics, however, have suggested that Oswald could not have fired shots so accurately and rapidly with this weapon and from this position. Expert marksmen were unable to duplicate Oswald's alleged feat during reenactments by the Warren Commission in 1964.